Commitments and Contingencies (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Dec. 27, 2016 USD ($)	Aug. 31, 2013 Company	Dec. 31, 2018 USD ($) ft² Lease Company Case States	Dec. 31, 2017 USD ($)
Leases [Abstract]
Rent expense			$ 1,393	$ 1,344
Operating Leases, Future Minimum Payments [Abstract]
2019			1,233
2020			881
2021			815
2022			681
2023			65
Thereafter			0
Total			$ 3,675
Litigation and Contingencies [Abstract]
Number of companies patent infringement lawsuits filed | Company		6
Number of cases resolved | Company			3
Number of cases pending | Case			2
Number of cases filed | Case			3
Number of states in the antitrust litigation | States			41
Damages claimed	$ 100,000
Ameriplex [Member]
Leases [Abstract]
Lease area | ft²			73,000
Lease expiration date			Sep. 30, 2022
Melton [Member]
Leases [Abstract]
Lease area | ft²			8,400
Lease expiration date			Mar. 31, 2023
Lease term			5 years
Warren [Member]
Leases [Abstract]
Lease expiration date			Feb. 28, 2020
Lease term			18 months
Number of two-year renewal options | Lease			5
Renewal options period			2 years